Undoubtedly at times of tribulation there is a lot of propaganda and excitement, hence the role of rumours. It is well known that verifying news is required according to sharee’ah, because Allah says (interpretation of the meaning):
“O you who believe! If a Faasiq (liar — evil person) comes to you with any news, verify it, lest you should harm people in ignorance, and afterwards you become regretful for what you have done.” [Al-Hujuraat, 49:6]
What is meant by verifying is making the effort to find out the truth of the matter, so as to establish whether this can be proven or not. Verifying means making certain of the truth of the report and its circumstances.
Al-Hasan al-Basri said: “The believer reserves judgement until the matter is proven.”
In the above ayah, Allah issued a stern warning against passing on all that one hears. It was narrated that Hafs ibn ‘Aasim said, the Messenger of Allah ﷺ said: “It is sufficient as a lie for a man to speak of everything that he hears.” [Muslim in al-Muqaddimah, 6; Saheeh al-Jaami, 4482] [Source: IslamQA]